package com.control.servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.model.entity.Student;
import com.model.imp.StudentImp;

public class AddStudent extends HttpServlet {

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html;charset=UTF-8");
	     PrintWriter out=response.getWriter();
         String stuNumber=request.getParameter("a");
         System.out.println(stuNumber);
          if(stuNumber!=null){
        	  response.setContentType("plain/text");
              response.setCharacterEncoding("utf-8");
        	  StudentImp sp=new StudentImp();
	          Student student=sp.findByNumber(stuNumber);
	          if(student!=null){
		          
	        	  out.print("学号已存在");
	         
	          }else{
	                out.print("<font color='red'>*</font>");
	           }

                   out.flush();
                   out.close();
                   
          
          }
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

	}

}
